I'm skeptical. VERY skeptical.
20k? When even hi-end server drives are 15k?
Server drives turned to higher speeds faster, so I don't believe that
trend would reverse here - server business is more lucrative, I'm
sure they don't want them to buy sata drives instead of sas & scsi.
The next logical step would be raptors catching up to 15k speeds,
not the 20k jump at once.